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Mobility concepts for IEEE 802.11

Mobility concepts for IEEE 802.11. Authors:. Date: 2008-01-16. Abstract. Draft mobility concepts for IEEE 802.11. Introduction. Future requirement for an IEEE 802.11 system is to allow mobility within an extended access network Typically found over a large metropolitan/country area.

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Mobility concepts for IEEE 802.11

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  1. Mobility concepts for IEEE 802.11 Authors: Date: 2008-01-16 Stephen McCann, Nokia Siemens Networks

  2. Abstract Draft mobility concepts for IEEE 802.11 Stephen McCann, Nokia Siemens Networks

  3. Introduction • Future requirement for an IEEE 802.11 system is to allow mobility within an extended access network • Typically found over a large metropolitan/country area. • Method of allowing mobility across ESS domains • Evolution of IEEE 802.11 to parallel functionality within IEEE 802.16e • Extension of IEEE 802.11r Stephen McCann, Nokia Siemens Networks

  4. 802.11 Architecture Overview: Figure 5-10 MIH Other higher layers using MAC state information MAC_STATE_GENERIC_CONVERGENCE_SAP MAC State Generic Convergence Function 802.1X MAC_SAP MSCF-SME_SAP MAC MLME SME Mobility Management MLME_SAP PHY_SAP MLME_PLME_SAP Interworking Service Management PLCP sublayer PLME PMD_SAP PLME_SAP PMD sublayer RSNA Key Management Note: The base standard version of this diagram is Figure 5-10 on page 42 of 802.11-2007 Stephen McCann, Nokia Siemens Networks

  5. Mobility Manager • This figure has been copied from the current IEEE 802.11u draft • Work within IEEE 802.11u has shown that a mobility management entity is possibly required within the SME, to allow an interface to IEEE 802.21 to be correctly defined. • Extending the functionality of this entity would allow true IEEE 802.11 mobility in a similar way to that of the IEEE 802.16e functionality. Stephen McCann, Nokia Siemens Networks

  6. Handoff in IEEE 802.11 • Handoff occurs • with physical movement • with changeable environment • Assumption • Every AP has identical security policy and common capabilities. • Handoffs within the same ESS Stephen McCann, Nokia Siemens Networks

  7. Existing Research on802.11 Fast Handover • Reducing Probe Delay: • SyncScan [2], Multiscan [3], NG-Pruning [4], Channel Mask [1] • Reducing Authentication/Re-association delay • PNC [6], SNC [7], FHR [5] Stephen McCann, Nokia Siemens Networks

  8. Neighbor Graphs-Pruning (Reducing Probe Delay) Stephen McCann, Nokia Siemens Networks

  9. Work to be done • Discuss this concept within IEEE 802.11 WNG SC for further comments and feedback. • Effectively introduce IEEE 802.16e mobility type concepts into IEEE 802.11. • Interesting to see how IEEE 802.21 would fit into this, as a mobile capable IEEE 802.11 "system", would no longer require IEEE 802.21 ;-) • Perhaps this is all too scary ! Stephen McCann, Nokia Siemens Networks

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